/Engine/Plugins/Online/OnlineServicesOSSAdapter/Source/Public/Online/OnlineIdOSSAdapter.h
Returns a copy as it's not thread safe to return a pointer/ref to an element of an array that can be relocated by another thread.
FUniqueNetIdPtr GetIdValue ( const [TOnlineId](API\Runtime\CoreOnline\Online\TOnlineId)< IdType > OnlineId ) const